// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/renderer/dom_storage/webstoragenamespace_impl.h"

#include "base/logging.h"
#include "content/common/dom_storage/dom_storage_types.h"
#include "content/renderer/dom_storage/webstoragearea_impl.h"
#include "third_party/WebKit/public/platform/URLConversion.h"
#include "third_party/WebKit/public/platform/WebSecurityOrigin.h"
#include "url/gurl.h"
#include "url/origin.h"

using blink::WebStorageArea;
using blink::WebStorageNamespace;

namespace content {

WebStorageNamespaceImpl::WebStorageNamespaceImpl()
    : namespace_id_(kLocalStorageNamespaceId)
{
}

WebStorageNamespaceImpl::WebStorageNamespaceImpl(int64_t namespace_id)
    : namespace_id_(namespace_id)
{
    DCHECK_NE(kInvalidSessionStorageNamespaceId, namespace_id);
}

WebStorageNamespaceImpl::~WebStorageNamespaceImpl()
{
}

WebStorageArea* WebStorageNamespaceImpl::createStorageArea(
    const blink::WebSecurityOrigin& origin)
{
    return new WebStorageAreaImpl(namespace_id_, url::Origin(origin).GetURL());
}

WebStorageNamespace* WebStorageNamespaceImpl::copy()
{
    // By returning NULL, we're telling WebKit to lazily fetch it the next time
    // session storage is used.  In the WebViewClient::createView, we do the
    // book-keeping necessary to make it a true copy-on-write despite not doing
    // anything here, now.
    return NULL;
}

bool WebStorageNamespaceImpl::isSameNamespace(
    const WebStorageNamespace& other) const
{
    const WebStorageNamespaceImpl* other_impl = static_cast<const WebStorageNamespaceImpl*>(&other);
    return namespace_id_ == other_impl->namespace_id_;
}

} // namespace content
